Drive for gyratory crushers and the like



June 22, 1965 L. G. SYMONS DRIVE FOR GYRATORY CRUSHERS AND THE LIKE Original Filed Nov. 14, 1961 2 Sheets-Sheet 1 June 22, 1965 L. G. SYMaiiamys 35,190,570

DRIVE FOR GYRATORY CRUSHERS ND THE LIKE Original Filed Nov. 14, 1961 2 Sheets-Sheet 2' IN VEN TOR.

jam/7 flaw/mg.

United States Patent 3,190,574) DRHVE FDR GYRATORY CRUSHERS AND THE LEKE Loren G. Symons, North Hollywood, Calif., assignor to l lordherg Manufacturing Company, Milwaukee, Wis., a corporation of Wisconsin @riginal application Nov. 14, 1961, Ser. No. 152,221, new Patent No. 3,140,834, dated duly 14, 1964. Divided and this application Feb. 18, 1964, Ser. No. 345,686 2 Claims. (Cl. 241-215) This is a division of Serial No. 152,221, filed November 14, 1961 now Patent No. 3,140,834, granted July 14, 1964.

This invention is in the field of material reduction machines and is concerned, among other things, with an improved gyratory crusher.

A primary object of the invention is an improved gyratory crusher which is efiicient in use.

Another object is an improved eccentric for the head of a gyratory crusher.

Another object is an improved drive arrangement for a gyratory crusher which reduces the tooling expense for its manufacture.

Another object is a gyratory crusher with an eccentrically gyrated head in which the tooling expense for the eccentric is materially reduced.

Other objects will appear from time to time in the ensuing specification and drawings in which:

FIGURE 1 is a vertical section of a gyratory crusher; and

FIGURE 2 is an enlarged view of a portion of FIG URE 1.

In FIGURE 1, a crusher has been shown generally including the following main parts, a main frame A which supports a bowl structure B releasably held on the main frame by a release mechanism C and arranged to be adjusted by an adjustment mechanism D. The main frame also supports a crushing head E defining a crushing cavity with the bowl.

The main frame A includes a base flange with an upstanding housing 12 and a supporting flange 14 for the bowl structure at the upper end. The base flange is connected to a center hub 16 by a web structure 18. The center hub supports an eccentric 20 which has a suitable counterweight 22 at its upper end overhanging the upper end of the center hub and connected to a ring gear 23 by bolts 24 or the like, which in turn is driven by a pinion 25 on a drive shaft 26 which in turn may be driven by a belt and pulley arrangement or any suitable means, not shown.

The drive shaft may be supported by bearings 27 in a sleeve 28 suitably held in a boss or journal 29 which is a part of the frame with a pulley 30 or the like at the outer end of the shaft.

The lower end of the center hub is closed by a bottom cap 32 which houses a thrust bearing arrangement 34 of any suitable type supporting the eccentric. The hub may have a suitable lubricant inlet connection, as at 36, with outlets at 37, and a suitable bearing sleeve 38 may line the center hub around the eccentric, removably held in by bolts 39 or the like, in FIGURE 2. The webs around the center hub may be closed on top by a de- 3,190,570 Patented June 22, 1965 ice tachable annular support 40 which defines a socket 42 lined with a brass or bronze seat or liner 44 on its upper surface and described about a center of gyration X, for supporting the head. The support itself may be removably held on the main frame by studs 45 or the like.

It will be realized that whereas a practical and operative device has been described and claimed, nevertheless many changes may be made in the size, shape, number and disposition and relation of parts without departing from the spirit of the invention. It is, therefore, wished that the description and drawings be taken as in a broad sense illustrative or diagrammatic rather than as limiting to the precise showing.

The use, operation and function of the invention are as follows:

In prior crushers of the gyratory type, the eccentric has been driven through a suitable input shaft to cause the head to gyrate about a focal point X. This involves providing a gear face on the counterweight of the eccentric to mesh with a driving pinion or gear. Thus, the entire eccentric and counterweight, a rather large casting, must be handled in whatever tooling is required, such as a large gear cutter, milling machine, etc., to form the gear face. The size of the eccentric and counterweight itself re quires that the tooling to do this be quite large, whereas the actual portion being machined, the gear face on the counterweight, would not otherwise require such large expensive tooling.

Making the gear on the eccentric and counterweight separate has the advantage that the gear itself may be in the form of a separate, thin ring which is much easier to handle during machining. The counterweight is bulky and may be made an integral part of the eccentric or may be separate, as desired. But, in any event, the important point is that the gear is separate from the counterweight which greatly reduces tooling and machining expense.

I claim:

1. In a crusher, a main frame, a central hub in the frame with a generally vertical axis, and an eccentric rotatably positioned in the hub having an eccentric bore adapted to receive the lower end of the crushers head shaft, the eccentric having a counterweight formed integrally at the upper end thereof overhanging, surrounding and extending below the upper end of the central hub, and a ring gear removably connected to the counterweight around the hub, below the upper end of the hub.

2. The structure of claim 1 in which the ring gear is bolted to the counterweight by bolts which extend down through the counterweight into the upper surface of the ring gear.

References Cited by the Examiner UNITED STATES PATENTS 1,553,202 9/25 Symons 24l215 1,706,975 3/29 Cooke 241-215 2,468,342 4/49 Munro 24l-2l5 2,540,358 2/51 Symons 241215 2,579,239 12/51 Lippmann 24l-215 ANDREW R. IUHASZ, Primary Examiner. 

1. IN A CRUSHER, A MAIN FRAME, A CENTRAL HUB IN THE FRAME WITH A GENERALLY VERTICAL AXIS, AND AN ECCENTRIC ROTATABLY POSITIONED IN THE HUB HAVING AN ECCENTRIC BORE ADAPTED TO RECEIVE THE LOWER END OF THE CRUSHER''S HEAD SHAFT, THE ECCENTRIC HAVING A COUNTERWEIGHT FORMED INTEGRALLY AT THE UPPER END THEREOF OVERHANGING, SURROUNDING AND EXTENDING BELOW THE UPPER END OF THE CENTRAL HUB, AND A RING GEAR REMOVABLY CONNECTED TO THE COUNTERWEIGHT AROUND THE HUB, BELOW THE UPPER END OF THE HUB. 